Comment #23 on issue 2307 by smi...@gmail.com: Duplicate methods: as_coeff_mul and as_coeff_Mul
http://code.google.com/p/sympy/issues/detail?id=2307

It's a headache either way to do what the other is doing:

to miimic as_coeff_mul()
    c, m = expr.as_coeff_Mul()
    margs = Mul.make_args(m)
    if not c.is_Rational:
        c, m = S.One, expr

to mimic as_coeff_Mul
    if expr.is_Mul:
        a, b = expr.as_two_terms()
        if not a.is_Number:
            a, b = S.One, expr
    else:
        a, b = S.One, expr

or

    c, margs = expr.as_coeff_mul()
    if margs and margs[0].is_Number:
        c *= margs[0]
        margs = margs[1:]
    m = object.__new__(Mul)._new_rawargs(*margs)

I've proposed some alternative names. With epath, perhaps the user will be
encouraged to access pieces via that. Internally, I think both have their
place.

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